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image.go
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image.go
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package dist
import (
"encoding/json"
"github.com/pkg/errors"
"github.com/buildpacks/pack/internal/style"
)
type Labeled interface {
Label(name string) (value string, err error)
}
type Labelable interface {
SetLabel(name string, value string) error
}
func SetLabel(labelable Labelable, label string, data interface{}) error {
dataBytes, err := json.Marshal(data)
if err != nil {
return errors.Wrapf(err, "marshalling data to JSON for label %s", style.Symbol(label))
}
if err := labelable.SetLabel(label, string(dataBytes)); err != nil {
return errors.Wrapf(err, "setting label %s", style.Symbol(label))
}
return nil
}
func GetLabel(labeled Labeled, label string, obj interface{}) (ok bool, err error) {
labelData, err := labeled.Label(label)
if err != nil {
return false, errors.Wrapf(err, "retrieving label %s", style.Symbol(label))
}
if labelData != "" {
if err := json.Unmarshal([]byte(labelData), obj); err != nil {
return false, errors.Wrapf(err, "unmarshalling label %s", style.Symbol(label))
}
return true, nil
}
return false, nil
}